Etaeiue propeller



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UNITED STATES PATENT OFFICE.

ELBRIDGE WEBBER, OF GARDINER, MAINE, ASSIGNOR TO HIMSELF, G. W. WAITT,OF SAME PLACE, AND N. B. STARBUCK AND G. H. STARBUCK, OF TROY, NEW YORK.

MARINE PROPELLER.

Specification of Letters Patent No. 28,542, dated May 29, 1860.

To all whom it may concern:

Be it known that I, ELBRIDGE WEBBER, of Gardiner, in the county ofKennebec and State of Maine, have invented a new and useful Improvementin Propellers; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theannexed drawing, forming part of this specification, in the severalfigures of which similar characters of reference denote the same parts.

Figure l, is a side view of the propeller. Fig. 2, is a rear view ofsame. Fig. 3, is a perspective view. Fig. 4, is a similar view withblades slightly curved. Fig. 5, is a top view showing position of bladeswith respect to axis of shaft.

This is a propeller with two blades, each making an angle of about 45with the axis of the shaft, so set upon the hub as to be entirelyforward of the rear portion thereof, and on opposite sides of a planepassing through the axis of the shaft, the details of construction andoperation being as follows: In the drawing S is the shaft, and H the hubto which is attached the blades B B.

The blades may be cast with the hub or attached thereto by any methodsuitable to that end. They are slightly elongated in direction of shaftas seen in Fig. 3, and have such a relation to the hub that the entireblade is forward of a plane at the rear extremity of the hub andperpendicular to its axis. The blades are on opposite sides of a planepassing through the axis of the shaft, so that they will not overlapeach other as shown in Fig. l. The advantage of this construction liesin the fact that the blades are at all times enabled to press upon waterthat has not already been acted upon by the o posite blade, as must bethe case where t e blades project to the rear of the shaft.

I claim- The construction of propellers with the two blades B B shapedas described and placed at about an angle of 45 with the axis of shaft,on opposite sides of a plane through said axis, and altogether forwardof the rear extremity of the hub substantially as set forth.

In testimony whereof, I have hereunto signed my name before twosubscribing Witnesses.

ELBRIDGE WEBBER.

Witnesses JosIAH MAXEY,

GEO. W. WAITT.

